Scale.



No; 856,998.' PATENTED JUNE 11, `1907.

' P., P. DUNN.

. soALB.

APPLIUATIION FILED NOV.' 19, 1906.

- Witwe/Agca l 1 uni-TED' efiainel FRANK r.4 DUNN, oFANDeRsoN, iNDiANA, AssieNoii or oNE-rooiirii To f.. eiioiien v1?..jLoUieo, oNE-rir'rrifro HENRY ii; DUNN, oNii-Dieiirn To riifrnn'roirion MARTINDUNN, AND oNaEieirrii ToA EDWAiiD W. Louise, ALL or `AN- Toall wh/,0m if may concern: Be it. knowntliat I, FRANK P.- DUNN, a "citizen fof the United 1 States, residing at 5 State ofln'diana, have invented certain new Y kand useful Improvements in Seales, of which theifollowingjis axspecication.. y The objectiefniyinventionvis to lproduce d l :an automaticallyoperatinv scale, vthe parte ,fio coming to balancejiinder l Lainounts byreason of the automatic shifting of acounter-balance, theefl'eet oi' which upon i the scale-'beam'-vaiesfinversely as the appliedweight. y 'Tlie..`aeeoinpanying drawing,.which is a ide'eleyatiojn' partial 4 vertical section, illustratedilly-invention. .l 1 In'vth'e ldi'aviA ng 10 indicates a suitable base ifi-vin afuierummiiriard ii provided wat beam 1,3 is "fulcrumed said inainbeain carrying platforin-14 onitssliorter arm; Beam HIV'13 atitsfouter end'is weighted at 15, for a e purposefwhieh Willappean n douter end of beam 13 is a shaft 16 which carries a--pointer arm 17 adapted to traverse *the us'ualjcomputingseale 18. Shaft 16 also nclinedownwardly and lthis arm is connected tlitlieouter end ofthe bea-iii `13by means Vfrein'shaft :16 in opposition to arms 19 v anlarrnjQLWhich Carries an adjustable ballne.jiireigh't y'22.,- The normal position of ari`i'1n21 isewung 'trom thev vertical, so that eight22 is normallyin van unetable position, havin 'yacontinuous tendency toi'all. Weight Sofpioportione' "that, With the parts in the poei'tion'sshoWn inthe drawing, aweight of, Sipfyt'll)A pounds, upon the platform 14 is nect ofiits'weighing movement, with Weight sfmoststable position, e., directly ,Y oli relation" to' weight 22 that yWhen said 'iskinfits in aeriinuiny positioii,' and ,X-ertingjits maximum turning Saidv shaft and its maximum lift some.

Y Specification of Letters "Patent i .Applioationililed November 19, 1206. Serial No. 344,018.

fgAndereo, in'thefcounty of Madison and' cade of different uitab eknrifefedges 1 2 upon which 'the mainf vPivotedupon suitaile knife *edgesA above.

Scale beain.

"ca'i'riesa'pair ofg'arme 19e-19 which normally' 20,5 euitable knife-edge eonneetions n ginadebetvfeen the link, beam 13, and iiisfl19;in avvll known manner. Extend- 22 an :thewei hted end 15 of beam 13 are sary'toibring the "beam to balance at the` neathshaft 16'. `The Weight 15 also bears Patented .Tune 1 l. 1907.

upon `the beam 13, the scale will be in balance with the finger' 17 at the initial end ol the computing scale.

If noi/vv a weight of less than 10 pounds be put upon the platform, the eounterbalance 22 being, when combined with the load. plaeedupon the platform, more than enough t'o balance the weighted beam, will descend until it reaches a position where its effective lift upon the scale beam has decreased a suiiieientainount to bring the parte to a balance. .lt will be noticed, theiel'ore, that the couriterbalance 22 isinitially ina position Ato move in a direction allecting the Beale.

beam. in the saine Way that the applied load alirects the scale beam and that, as the applied load affects the scale beam, the counteibalanee gradually decreases in ei'l'eet u on tire scale beam until the parte come to a `)alance. The added load, therefore, causes a movement of the cou iiterbalance in the direction in which gravity continually tends to move it. The scale is, therefor@ execedingly sensitive.

in order to check oscillations-of the indicator arm, l provide a novel dash-pot for the rlhe dash pot consists of the main cylindrical chamber 3() iii which is reciproeably mounted a pieton 3l hung 'from the scale beam 13. The upper and lower ende of the dash. pot 3() are connected by a passage 32 in which is mounted a valve 33 which sei-ves to adjust the by--pgiss opening ,close the saine.

AS is usual with scales of this character the beam 13 may be provided with a suitable `tare beam 40 having a proper tare Weight 41 adjustable thereon.

I claim as my invention:

1. ln a scalo, the (-,oinliination with a pivoted Vbeam adapted to receive a load on one end, and having a normally Weighted opposite end to oppose an applied load, of a counterbalance normally in a raised position, a

- Elddtli 'and thus control the llow of `lluid from one TOO ai l 856,998

connection between said counterbalanee and the scale beam whereby said counterlmlance` site end to oppose au applied load, of a countcrbalance normally in a raised position, a connection between said counterbalancc and the scale beam whereby said counterbalance will act until cduililnium upon the scale in v the direction olfapplied load with a variable force diminishing as the counterbalancev approaches a lower position, and means 'for indicating' the position ol equililnium oi the beam under an applied load, whereby the feet oi said applied load is indicated.

3. ln a scale, the combination with a pivoted beam adapted to receive a load on one end, and` havingT a normally weighted opposite oud to oppose an applied load, of a counterbalance 'normally in a raised position, a connection between said eounterbalam-.e and the scale beam whereby said counterbalance will act until equililnium upon the scale in the direction ol applied load with a variable force as the counterbalance approaches or rccedes Afrom its 'normal position, an indicator scale, and an indicatorconnected to the scale beam to move therewith and traverse the scale, whcreb' the various positions ol" equilibrium of the structure under dillerent ap plied loads may be indicated to indicate the ell'ect el the particular applied load.

'4. ln a scale, the combination with a pivotcd beam adapted to receive a load on one end, and having a mirinally weighted oppov site end to oppose au applied load, of a counterbalance normally in a raised position, a connection between said eounterbalance and the scale beam whereby said counterbalancc will act upon the scale in the direction of applied load with a variable ,torce diminishing as the countcrlniiance zniproaehes a lower position, au imlicator scale, and an indicator connected to the scale beam to move therewith and traverse the scale. Y

ln 'a scale,'the combination with a oted beam adapted to receive. a load en one end and having' a normally weighted opposite end to oppose an applied load, of a rocksha'ft, an arm carried by said shaft and connec-ted to the scale beam, a counterweight arm carried. by said shalt in a normally raised position, a counterweight on said arm to act until equilibrium upon the scale beam in the direction ol' applied load, and means for indicating the position of equilibrium of the beam under an applied. load, whereby the et# teet of said applied load is indicated.

o. ln a scale, the combination with. a plvoted beam adapted to receive a load on one end and having a normally weighted ppposite end to oppose an applied loadyciqi'jocltshalt, an arm carried by said shaft `and connect-ed. to the scale beam, a COUnteI'NveigIit arm carried by said shaft in a normally raised position, a counterweight -on said arm to act upon tbe scale beam in .the direction of ap'- plied load, an indicator scale, aili'd an arm carried by the rock shaft and traversing the scale.

7. ln a scale, the combination with a pivoted beam adapted to receive a load on one end, and having a normally weighted oppo site end to oppose an applied load, of a counterbalanee normally in a raised position, a connection between said counterbalanee and the scale beam whereby said. eounterbalance will act upon the scale beam inthe direction of applied load wit h a variable force as the counterbalance approae ies or reeedes from its normal position, a dash pot having a passageforming?r a connection between lits ends, a 'rotatablo valve mounted in said passage and having a portion adapted to lie parallel with the passage or transversely across the same, and a piston mounted in the dash pot and connected with the scale beam. i

8. In a scalo, the combination with a pivoted beam adapted to receive a load onone end, and having a normally weighted oppo-l site end to oppose an applied load, of a counterbalance.normally in a raised position, a connection between said counterbalance and the scale beam whereby said counterbalance will act upon the scale in the direction of ap plied load with'a variable force diminishing as the counterbalance approaches a lower position, a dash pot having,r a passage forming a connect' between its ends, a rotatable valve nu ted in said passage and having a portion adapted to lie parallel with the passage or transversely across the same, and a piston mounted in the dash pot and connected with the scale beanr..

il. ln a scale, the combination with a pivoted beam adapted to receive a load on one end, and having a normally weighted oppos-te end to oppose an applied load, oa counterbalance normally in a raised positiom a connection between said, counterbal-nnce and the scale beam whereby'said couiiwroalance will act upon the scale 'in .thedireelioh of ap Y plied load with a variable' force a the coun- I scale beam to move therewith arid traverse the scale, a dash pot having a passage forniing a connection between its endsya rotatablevalve mounted in said passage and having a portion adapted to lie parallel'witlthe passage or transversely across the same, an'il IOO IIO'

-site end to 'oppose 'an applied load, of a connterbalance normally in a raised position, a

connection between said counterbalance and th(` scale` beam whereby said counterbalance will act upon the scale in thc direction of applied load with a variable force diminishing the counterbalanee approaches a lower position, an yindicator scale, an'indicator connected to the scale beamto move therewith andtraverse the scale, a dash pot having a passage forming a. connection between its ends, a rotatable valve mounted in said passage and having a portion adapted to lie parallel with thepassage or transverselyvacross the same, and a piston 'mounted in the -dash 'pot Aand connected with the scale beam.

11. In a scale, the combination with a pivoted beam adapted to receive a load on one end and having ,a normally weighted oppo site ,cnd Ato oppose an applied load, of a rockshaft, 'anarm carried bysaid shaft and connected tothe scale beam, a cbunterweight arm carried by said shaft in a normally raised position, a counterweight on said arm to act upon the scale beam in the .direction of applied load, a dash pot having a passage forming a connection between its ends, a rotatable valve mounted in said passage and having a portion adapted to lie parallel with the passage or trarrsverselyacross the same, and a piston mounted in the dash pot and connected with the scale beam.

12. In a scale', the combination with a pivoted beam adapted to receive a yload on one end and having .a normally weighted oppo site end to oppose an applied load, of a'rockshaft, an arm carried by said shaft and connected to the'scale beam, a count'erweight ann carried by said shaft in a normally raised position, a counter'weight on said arm to act`vr upon the scale beam in the direction of applied load, an indicator scale, an arin carried bythcrock shaft and traversing the scale, a dash pot having a passage forming a connection between its ends, a rotatable valve 5o mounted in said passage and having a portion adapted to lie parallel with the passage or transversely across the same, and a piston y mounted in the dash pot and connected with the scale beam. I

13. In a scale, the combination with a pivoted beam adapted to receive a load on one end and having a normally weighted opposite end to oppose anapplied load, of a counter-balance normally in a raised position, a 6o connection between said counter-balance and ,the scale beam whereby said counter-balance -willy act until equilibrium upon the scale beam in the direction of an applied load'with a force varying as the counter-balance ap- -65 proaches or recedes from its normal raised position, and 'means connected lwith said mechanism for automatically indicating the position of equilibrium under a given applied loadand thereby indicating the effect of such 7o load upon the structure.

14. In a scale, the combination with a pivoted beam adapted to receive a load on one end and having a normally Weighted opposite end to oppose an applied loadyofa 'rota- 7 5` tive indicator support, an indicator, ajscale traversed by said indicator, a connection be` ,tween the indicator support and the scale beam, a counterweig t arm carried by said indicator support in a normally raised posi-/So tion, a counter-Weight on said arm to act upon the scale beam in the direction ofthe applied load, and means connected to said scale connected to one of the movable parts of said structure to regulate the vibration of the 8: beam. In witness whereof, I, have hereunto set my hand and seal at Anderson, Indiana, this 15th day of November, A. D. one thousand nine hundred and six. e FRANK RDUNN. [L sl Witnesses:

' 'PEARL I WARDEN, 

